Margaret claims to have met the prince in a supermarket by Eton College, near Windsor, and that they talked for "more than an hour" on their first date.

She continued: "When I said I had to go because I needed to catch a certain bus, he asked me for my mobile number.

"He didn't offer me his, but he did ask me not to talk to anybody from the newspapers about him - which offended me a bit, so half-jokingly I said to him, 'OK, on condition you don't talk to them about me' - which made him laugh.

"Anyway, he called me the next day and said he'd enjoyed my company and would like to see me again."